TDC BB

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emac

emac

10 Year
Joined
Aug 28, 2015
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I spend some time trying to locate TDC on my engine tonight to install the dizzy. 1977 FJ40 2F motor. I couldn't find the BB on the flywheel. I knew I was close to TDC as I was using the finger over #1 spark plug to verify compression stroke.

I went back inside and looked up some photos of the flywheel. I went back out, pulled my flywheel off and verified that it was in fact a toyota flywheel.. I took a wire wheel to it and found a small discolored circle. No BB and no groove cut before or after it.

The discolored circle seems to match TDC as best I can tell. Is this normal for 1977? Could it have come off?
 
Ernest, it should look like this
28192-1414522287-51140a61adeb3013ac0bd099c9bb1269.jpg
 
Occasionally I get a rig to work on that the BB has fallen out of; it happens. Remember, it is 7 degrees BTDC.

Best

Mark
 
Guys,
Mine looks nothing like that! There is no groove and no remnant of where a bb was. The flywheel has a toyota marking on it and a number. I will take a picture of it tonight. Weird. I see nothing but a discolored circle. Flywheel is smooth.
 
Here are a couple of shots of my flywheel. The second picture is a close up of what I believe was TDC. Anyone ever seen a flywheel like this? Is it from a different model? This really threw me for a loop, trying to find the timing mark!

20151107_103908.webp

20151107_103946.webp
 
Wow! Ernest that doesn't seem normal. I recommend you copy the timing marks on your flywheel by using a punch for the BB, and chisel for the straight line and some paint. Then all you'll need is to use a friend's flywheel for reference.
 
emac said:
Here are a couple of shots of my flywheel. The second picture is a close up of what I believe was TDC. Anyone ever seen a flywheel like this? Is it from a different model? This really threw me for a loop, trying to find the timing mark!

View attachment 1158790

View attachment 1158791
Click to expand...

Were you able to find the TDC mark?

I don't see it in this pic
20151107_103946-jpg.1158791


Nor this one
20151107_103908-jpg.1158790
 
See the patch of rust? Just to right. It is the lighter color circle. Same location as the BB on other flywheels. My only guess is this is not the original flywheel. It must be from a later model with electronic ignition?? I tried to search the part number but I didn't come up with anything.

I have referenced it against other flywheel pictures and that lighter color circle is the correct place for the BB. 7 degree mark is three teeth before.

This stuff only happens to me.
 
I know this is an old thread but wanted say that you aren't the only one! My flywheel was missing tdc but did have the BB. Added tdc with a chisel!
 
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